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Expired Canadian patentCanada

Well indicating device

CA 1257357 A · Owner: Fmc Corporation · Inventors: Provonchee, Richard B.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A Well Indicating Device which is useful in laboratory procedures for identifying, in a predetermined but variable sequence, wells of a plurality of independent but interrelated substance-receiving wells such as of, a microtiter tray, which are subject of manipulation.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted July 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 11, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 7, 1986
GrantedJuly 11, 1989
Term endedJuly 11, 2006
Patent numberCA 1257357 A
Classification (IPC)B01L99/00 +1 more

Timeline

Timeline From CIPO dates

1987198919911993199519971999200120032005Application filedMarch 7, 1986Patent grantedJuly 11, 1989Term endedJuly 11, 2006

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.